Typewriting-machine



R. W. UHLIG.

TYPEWRITING MACHINE.

APPLICATION FILED 0611311917.

1,38%,788. Patented July 19, 19219 3 $HEETS-SHEET WVENTW; WW. UHL 1c R.-W. UHLIG. TYPEWRITING MACH INE.

APPLICAT ION FILED OCT. 13, 1917- ]?atented July 19,1921.

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Specification otLetters Patent. Patent d July 19 1921 Application filed October 18, 1917. Serial No. 193,3?4.

' Fig.-9; is an elevation looln'ng at the back To all whom it may concern:

Be it known that I,.RIOHARD W. UHLIG, a citizen of the United States,and a resident of Arlington, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in T pewriting-Machines, of which the following is a specification.

This invention relates to typewriting machines and the like, and it is an object of the invention to provide improved means to hold and feed the paper around a cylin- "and .drical and rotatably supported laten.

It is a further object of the invention to provide improved means to line space-the platen.

Another object of the invention is to pro-.

vide improved adjustable means, commonly termed margin stop mechanism to limit the to and fro movements of the carriage and thereby regulate the beginning and ending of the line of writing, and to release said means to permit of wrlting beyond said predetermined limits.

In the drawings accompanyin and forming a part of this s cification igure 1 is a front elevation o a platen carriage for typewriting'machines, partly broken away, illustratin an embodiment of my improved means to old and feed the paper around the platen.

Flg; 2 is a sectional end elevation, looking at the left of Fig. 1 showing'the parts in normal paper ho.'ding and feeding position.

Fig. 3 is a view similar to Fig. 2 but showing the parts in paper releasing position.

ig. 4c is a view similar to Fig. 1 showing an embodiment of my improved line spacing mechanism.

Fig. 5 is a view looking at the right of Fig. 4 with the platen rotating knob removed and showing the line spacing mechanism in normal inoperative position.

Fig. 6 is a view similar to Fig. 5 but showing the parts in position at the end of a line spacing movement.

Fig. 7 is a sectional end elevation of means to regulate the line spacing movement.

Fig.8 is a sectional end elevation showing means to throw a detent, shown in Figs. 5, 6 and 7 in engagement with the ratchet wheel to retain the same a ainst movement, out of engagement with said ratchet wheel.

of Figs. 1 and 4 to illustrate my improved means to limit the to and fro movementfof the arriage.

Fig. 10 is an end elevation looking at the rlght of Fig. 9 showing the parts in normal position. 1

Fig. 11 is a sectional view of Fig. 9 and showingstop mechanism to limit the movement of the carriage in letter space' direct1on, showing the parts in normal position;

Fig. 12 is a view similar to Fig. 11 but showing the parts" in released position. v

Similar characters of reference designate like arts throughout the different views of the rawings. 1

In he drawings I have shown an embodiment of my invention in connection with only so much of a typewriting machine of the front strike type as is essential to an understanding of the invention, in which a platen 12 is mounted upon an axle 13 journaledin the ends 14, 15 of a platen frame or carriage 16 mounted upon a support 17 by ball bearings 18 to have to and fro movement. The axle has knobs at opposite ends whereby the platen may be rotated.

In Figs. 1 to 3 there is 'shown an embodiment of my improved means to hold and feed the paper .around the platen 12 ,in which a table 19 to guide the paper around the platen extends between the ends '14, 15 of the platen frame and inclines downwardly with the forward end extending below and v conforming to the curvature of the platen, and has a rod 23 secured thereto, which rod is journaled at its ends in the ends of the,

platen frame to pivotally support the table. A roller 20 is rotatably carried by arins 31 fixed to the table to extend longitudinally of the platen forwardly of the table. This roller is normally maintained in yielding engagement with the platen by a spring 22, I

in the form of a leaf spring fixed to the carriage with its free ends engaging with the paper table andtensioned to normally ur e the table toward the platen and thereby t e feed roller 20 yielding into engagement with table and guided by the latter to the bight between the platen and feed roller and there- I paper from between roller and platen or for the purpose of adjusting the paper there is provided a lever 24 secured to the table supportin rod 23. By pulling this lever f orward mm the Fig. 2 to the Fig. 3 pos1t1on rotary movement will be imparted to the rod 23 and the table rocked to move the forward end thereof against the tension of the spring 22 and therewith the feed roller away from theplaten.

To look the table with the feed roller 1n the released position shown in Fig. 3 a latch 25 is pivotally connected to the lever 24, as

at 26, said latch having a bifurcated portion 27 to straddle the platen axle to guide and prevent the accidental throwing up of the same. The latch normally rests upon a p n 28 in the platen frame end, as shown m Fig. 2, .but as the feed roller 1s moved to released position the latch Wlll ride over said pin and the latter engage portion 29 of the latch thereby lock ng the lever 24 in its forward position against the tension of the, spring 22 and the feed roller out of enga ement with the platen as shown in Fig. 3. To release the lever 24 1t 1s only necessary to move the latch upwardout of engagement with the pin 28 by engaging the forward end thereof which is in the formof a finger-piece when the spring 22 will return the parts to initial position. To ma ntain the paper against the platen at t'heprmtmg point or line of wring/15 the leadmg edge of the paper is direct beneath a rod 30 extending longitudinally of the platen carried' by arms 31 pivotally carried at 32 by the platen frame, whereby said rod may be moved toward-and away from the platen.

To line space the laten there is fixed to the platen axle. a rate et wheel 35 with' which a pawl 36 cooperates, (Figs. 1 to 7). This pawl is pivotally supported by a carrier 37 having a finger-piece 38 hung on the platen axle. The pawl is adapted to have to and fro movement and-has a pallet 39 at oneend to engage the teeth of the ratchet wheel by gravity as the pawl carrier is moved rearward or in line spacing direction against the tension of a spring 40, this rearward movement being limited by the pawl engaging beneath a stop pin 41 projecting from the end of the laten frame and to which pin one end of the spring 40 is connected, the engagement of the pawl with this stop also serving to lock the pawl in engagement with a tooth of the ratchet wheel and thereby prevent overthrow of the platen during the line spacing movement thereof.

To limit the reverse movement of the pawl and thereby re ate the line spacing movement thereof t ere is provided a stop pin 42 projecting from an arm 43 hung on the a notched platen axle to have rotative movement and movement transverse to the platen axle,

said pin engaging in a bifurcation at the end of the pawl opposite to the pallet. The 43 has a pin-44 (Fig. 7) projecting from the side opposite the pin 42 which is adapted to engage in either one of a series of notches 45 in the platen frame end, the upper end of the arm being formed with a finger piece .wh'ereby'the arm may be ven a longitu inal movement to withdraw t e pin 44 from one of the notches 45' and insert it into another notch. One wall of the bifurcation at the end of the pawl, as at 46, is beveled to form a cam face whereby as the pawl is returned to initial position by the spring 40 after a line spacing movement has been imparted thereto said cam face will ride alon stop pin 42 thereby throwing and ho ding the pawl palletaout of engagement with the teeth of the ratchet wheel: The pawl is adapted to line space the platen a distance equlvalent to one to t ee tooth spaces of the ratchet. wheel, and it will be obvious that should the arm 43 be adjusted so that the arm pin 44 will en age in the notch 45 at the extreme left of ig. 7 the platen will be line spaced a distance equivalent to three notches of the ratchet wheel, and when it is adjusted so that said pin engages in the notch 45 at the extreme right of Fig. 7 the platen will be spaced a distance equal to one tooth space of the ratchet wheel.

To retain the platen in position to which it is adjusted by the pawl there is provided a pivoted detent 48 normally urged to engage a tooth space of the ratchet wheel by a spring 49. To release said detent from the ratchet wheel and thereby the platen to permit of the free rotation of the platen by the platen knobs there is provided a lever 50 on the side of the platen frame end opposite to the detent 48 (Fig. 8), said lever having'a cam portion 51 to cooperate with a pin extending laterally from the detent and through an opening in the platen frame end to move the detent against the tension of its sprlng 49 away from the ratchet wheel and .lock 1t in such position when the lever is moved to the full line position shown in Fig. 8. The detent is released to engage with the ratchet wheel by moving the cam lever 50 to the dotted line position, Fig. 8.

To limit the to and fro movement of the platen carriage and thereby regulate the right and left hand margin of the line of writing fixed stops 52, 53 are provided on the platen frame or carriage support, the stop 52 controllin the left hand end margin of the line of wrlting, and the stop 53 the right hand end. Stops 54, 55 to cooperate with the stops 52, 53 are movable to and from with the platen carriage. These stops the - 65 of engagement with or the path of the stops supported at opposite ends" in. the platen frame ends. The steps comprise a. member '57 havin a part to engage in a notch in i tute a part of the present invention illusotally supported and to impart 'rotative the top 0 the bar, and a member 58 ivotally connected to and bent to stradd e the member 57 and having a part to engage in a notch in the bottom of the bar 56 opp:- site to the notch inwhich the stop mem r 57 engages and has-a downwardly extending rojeetion 59 to normally occupy a position in line withthe' sto s 52, 53 in the normal position thereof.

and adapted to actuate line locking mechae stop .53 is supported nism when engaged by the stop projection 59,. but as this mechanism does not constitration and description thereof is not deemed necessary. The stop 55 cooperates with [the sto 52 on the carriage support 17. 5

sstat'ed the stop carrying bar 56 is pivmovement thereto to throw the stops carried thereby out of engagement or the path of movement of the stops 52, 53 permit of writing be ond the predetermined beginning or en ing of a hne of writin the bar has a-lever60 fixed thereto. As lever is moved forward the bar 56 will be rocked therebythrowing the stop pro ections 59 .rearwardly, as shownin Flg. 12, away from controlled pinion 62 meshing wi ha" rack 63 the escapement controll pivotally connected to opposite ends of the platen frameand adapted to be thrown int'o' and out of engagement with the pinion by a finger lever 64 connected to the ivotal su port of the rack, It is often ound des1rable to advance the carria e independent'of pinion 62 when the rack 63 is thrown out of engagement with the pinion 62 (Fig; 12), and should it be desired to advance or retract the'carriage beyond the right or left hand margin stops 52, 53 means are provided to simultaneouslythrow the margin stops 59 either out of engagement with or the path of the stops 52 53. For'this purpose the rack lever 64 has a laterally projecting pin 65 to extend through an opening in the end 14-of the platen frame to 'en go with a projecting portion 66 of the this pin normall occupying position with relation to t e stop-carrying bar actuating lever 60 shown in Fig. 11. It will be obvious that as the rack 63 is releasedfrom the inion, or moved to the position shown in ig. 12, the pin 65 engagin with the lever projection 66 will rock the ar 56 to the osition shown in said fi re and throw t e stops carried thereby elther out ar actuating lever 60, t e

'52, 53. It will also b". obvious that the bar '56 may be actuated b its lever mjdependent of the actuation o the rack .actuating leverj64. Having thus described my inventlon, I claim:

' 1. In a typewriting machine, the combina I tion with a to'and fro movable carriage and o f the pivotal support of the table tensioned to normally urge the table in a direction with the roller in engagement with the platen; and a lever fixed to the pivotal sup port of the table to'move the table and throw the roller out of engagement with the platen,

and arranged with means to coeperate with means on the carriage to lock the table in said sition.

2. n a typewriting machine, the combination with a to and fro movable carriage and a platen rotatably carried thereby, of a paper table pivotally supported by the carriage having a part extending below and conformin to the curvature of the platen and carrying a roller at the forward end thereof; a spring to yieldingly urge the table to position with the roller in engagement with the platen; a lever fixed to the I table support operable to rock the support and move the table to position with the roller carried thereby out of engagement with the platen; and releasable latching means operable by the movement of the lever to lock the lever and thereby the table in position with the roller carried thereby out of en gement with the platen.

3. n a typewriting machine, the combination with a to and fro movable carriage and a platen rotatably carried thereby, of a paper table pivotally supported by the carriage having a part to extend below and conforming to the curvature of the platen, said table carrying a roller at the forward end thereof to extend longitudinally of the platen; a spring to yieldingly urge theforward end of the table toward the platen with the roller in engagement with the platen;

a lever pivotally mounted on the carriage having a finger piece at one-end and fixed to the pivotal support of the table at the oppoto the support and table to throw the roller .out" of engagement with. the platen; and a site end and operable to impart movement with the platen, substantially as and for the purpose specified.

4. In a typewriting mach ne a frame to support a rotatable platen; a rock shaft mounted in the platen frame; a paper table to extend from the rear to below and to the front of the laten fixed to and baffled by the rock shaft; a roller carried at the forward .end of the table; a leaf spring secured between its ends to the platen frame with the free ends arranged to yieldmgly urge the paper table to position with the roller in engagement with the platen; and a finger lever pivotally mounted on the platen frame fixed at one end to the shaft and operable to rock the same to move the papertable to position with the roller out of engagement with the platen against the action of the spring.

,5. In a .typewritmg machine a frame to support a rotatable platen; a rock shaft mounted in the platen frame; a paper table to extend from the rear to below and to the front of the laten fixed to and carried by the rock sha t; a roller carried at the forward end of the table; a leaf spring secured between its ends to the platen frame with the free ends arranged to yieldingly ur e the paper table to position with the rol er in engagement with the platen; and a finger lever pivotally mounted on the platen frame and fixed at one end' to the shaft and operable to rock the same to'move the paper table to position with the roller out of'engagement with the platen against the action of the sprin and releasable latching means thrown to Iocking position to hold the paper table in position with the roller out of engagement with the platen when the table is moved to saidgposition.

6. In a typewriting machine a frame to support a rotatable platen; a rock shaft carried by the platen frame; a paper table toextend from the rear to below and to the front of the fplaten fixed to and carried by the rock sha t; a roller carried at the forward end of the table; aleaf spring secured.

between the ends to the platen frame with the free ends arranged to yieldingly urge the paper table to position with the roller in engagement with the platen; a finger lever connected to the shaft to rock the same to move the paper table to position with the roller out of engagement with the platen; a latch pivotally carried b the finger lever to engage a pin on the p aten frame as the lever is operated to move the table to position with the roller out of engagement with the platen and retain the table in such position, said latch being arranged with a finger piece to release it from said pin for the purpose specified.

Si ed at New York city, in the county of New ork and State of New York, this 21st day of July, 1917. RICHARD W. UHLIG. 

